When Paul puts the bottle of Wade Marsh back in the cupboard after adding drugs to it, he puts it on the left of another bottle. When he later takes it out, it is on the right of another bottle that had been behind it previously (Eagle's Spirit), suggesting that someone had been in the cupboard and rearranged the contents during an interim when no one was likely to have been there.
When Aynsley goes into the basement to snoop around, she is seen closing the door behind her. In the next shot, the door is shown ajar.
Cosima is supposed to live and attend school in Minneapolis. However when she is with Delphine after the Neolution seminar, Delphine lights a cigarette from what appears to be Canadian cigarettes. US cigarette packages are a different width and depth than Canadian packages.
Although Felix (Jordan Gavaris) refers to having to go to Scarberia (ie: Scarborough, a suburb of Toronto), the intersection indicated on the map is actually in Markham (still in the Greater Toronto Area)